void __init allocate_pgdat(unsigned int nid) { unsigned long start_pfn, end_pfn; #ifdef CONFIG_NEED_MULTIPLE_NODES unsigned long phys; #endif get_pfn_range_for_nid(nid, &start_pfn, &end_pfn); #ifdef CONFIG_NEED_MULTIPLE_NODES phys = __memblock_alloc_base(sizeof(struct pglist_data), SMP_CACHE_BYTES, end_pfn << PAGE_SHIFT); /* Retry with all of system memory */ if (!phys) phys = __memblock_alloc_base(sizeof(struct pglist_data), SMP_CACHE_BYTES, memblock_end_of_DRAM()); if (!phys) panic("Can't allocate pgdat for node %d\n", nid); NODE_DATA(nid) = __va(phys); memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; #endif NODE_DATA(nid)->node_start_pfn = start_pfn; NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; }
phys_addr_t __weak __init memblock_nid_range(phys_addr_t start, phys_addr_t end, int *nid) { #ifdef CONFIG_ARCH_POPULATES_NODE_MAP /* * This code originates from sparc which really wants use to walk by addresses * and returns the nid. This is not very convenient for early_pfn_map[] users * as the map isn't sorted yet, and it really wants to be walked by nid. * * For now, I implement the inefficient method below which walks the early * map multiple times. Eventually we may want to use an ARCH config option * to implement a completely different method for both case. */ unsigned long start_pfn, end_pfn; int i; for (i = 0; i < MAX_NUMNODES; i++) { get_pfn_range_for_nid(i, &start_pfn, &end_pfn); if (start < PFN_PHYS(start_pfn) || start >= PFN_PHYS(end_pfn)) continue; *nid = i; return min(end, PFN_PHYS(end_pfn)); } #endif *nid = 0; return end; }
static int __init numa_register_nodes(void) { int nid; struct memblock_region *mblk; /* Check that valid nid is set to memblks */ for_each_memblock(memory, mblk) if (mblk->nid == NUMA_NO_NODE || mblk->nid >= MAX_NUMNODES) { pr_warn("Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n", mblk->nid, mblk->base, mblk->base + mblk->size - 1); return -EINVAL; } /* Finally register nodes. */ for_each_node_mask(nid, numa_nodes_parsed) { unsigned long start_pfn, end_pfn; get_pfn_range_for_nid(nid, &start_pfn, &end_pfn); setup_node_data(nid, start_pfn, end_pfn); node_set_online(nid); }